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Finding the Fourth Proportional to 656.24, 985.07 and 396.89

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Solution

The fourth proportional to 656.24, 985.07 and 396.89 is: 595.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.24 : 985.07 = 396.89 : x
  2. Step 2: Convert to fraction form
    656.24/985.07 = 396.89/x
  3. Step 3: Cross multiply
    656.24x = 985.07 × 396.89
  4. Step 4: Simplify right side
    656.24x = 390,957.52
  5. Step 5: Solve for x
    x = 390,957.52/656.24
  6. Step 6: Final answer
    x = 595.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.